Integrity
The one thing you can give and still keep is your word. (Church sign board)
It used to be said that “a man’s word was his bond,” that is, you could trust a person to do what he promised to do. It’s a question of integrity and character. There isn’t much in life that you can give away and keep it at the same time. But when you give your word and then keep it, everyone wins. So, keep a guard on your lips and speak with honesty and good intent.
But most of all . . . never take an oath, by heaven or earth or anything else. Just say a simple yes or no (James 5:12).